Acer Aspire 5920

My cauzin Got Acer Aspire 5920 !! its charger stop working she buy another charger for it !! but due to inexperience she bought 24 volts instead of 18 volts !! after charging some time the laptop isn't working nor the power is coming to laptop !! now tel me wht will be affected inside the laptop !! i open it and see that none of IC's are burnt everything is normal !! Now my question is that if high volts charger is plugged to laptop what do it affect !! plzz help me out !!

This not something that can be dealt with here as it will need to be looked at by an experienced technician to see what damage has occured to the mobo and/or battery. The power supply you got with the wrong voltage may well be damaged also. If you are very lucky the charger may have a thermal overload in it and your PC may have a fuse or the battery has been wrecked which could be the reason why it won't turn on.